/*
 * Copyright (C) 2018 Pascal Welsch
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.pascalwelsch.konduit.widget

fun <T> WidgetListBuilder.singleSelectableListView(
        init: SingleSelectableListWidget<T>.() -> Unit): SingleSelectableListWidget<T> = add(
        SingleSelectableListWidget(), init)

class SingleSelectableListWidget<T> : ListWidget<T>() {

    var selectedItem: T? = null
        set(value) {
            checkWritability()
            field = value
        }

    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (other !is SingleSelectableListWidget<*>) return false
        if (!super.equals(other)) return false

        if (selectedItem != other.selectedItem) return false

        return true
    }

    override fun hashCode(): Int {
        var result = super.hashCode()
        result = 31 * result + (selectedItem?.hashCode() ?: 0)
        return result
    }
}